This is a duplicate post from another thread. I'm just posting it here so it'll be easier to find/look-up. You can find the release notes on dishsupport.com
ViP 722k - L690
HDCP force TV2 fix, Blockbuster "Select All" fix, EPG updates, Misc stability fixes
Software Release Notes Week of 10/10
ViP 222 - L505
HDMI Detect, Live Sports Theme, Basic Remote Upgrades, update pop-up text (024), Locks password pop-up changes, EPG updates, Misc stability fixes
ViP 211k - L550
Locks password pop-up changes, Opt in Free Preview Trigger, micro-timers (stuck view banner, nightly updates not firing) fix, KVH check switch fix, EPG updates, Misc stability fixes
Software Release Notes Week of 10/03
ViP 722 - L721
Misc fixes, Install Wizard, EPG Updates
Software Release Notes Week of 9/26
ViP 722k - L688
Locks password pop-up changes, DISH On Demand updates, misc updates.
ViP 722 - L677
Adaptive Streaming, 3D FVOD, Locks password pop-up changes, DISH On Demand updates, misc updates.
Software Release Notes Week of 9/12